Halo 3: ODST Easter Egg - Marty References

In the games HALO 3 and HALO 3: ODST, there are a few references to Martin O' Donnell, (or most commonly reffered to as "Marty") the musical director at Bungie Studios.
1.On the mission "Kiowani Station" (ODST) there is a weird dancing dude, which happens to be "Marty." This is completely different from the egg which can be found at http://www.eeggs.com/items/56724.html
2.There is an achievement on HALO 3: ODST called "Be Like Marty" which is, obviously, a reference to Martin O' Donnell.
3.On the HALO 3 mission "The Covenant" there is a place where you can hear Microsoft Sam saying things every 3 minutes, (once again, a completely different egg) and one of the things he says is "Happy Easter, Marty."